How to make such a material (Frosted glass)
Here is a try with Eevee, basically it's a Principled BSDF with Roughness at 0.6, Transmission at 0.97 and IOR at 1.23 (nothing very scientific here, probably needs to be tweaked), I've mixed it with a Glossy BSDF with a Layer Weight as factor in order to have more reflections on its periphery, and give it a Bump with a thin noise: